低压架空线路感应雷击过电压的计算与防护研究

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1、目录摘要iii引言31架空线路研究背景和研究意义31.1研究背景与意义31.2国内外研究现状31.2.1关于架空配电线路感应雷过电压计算的研究31.2.2关于架空配电线路感应雷过电压防护的研究31.3本文的研究内容及主要工作32雷电放电介绍以及雷电参数32.1雷电的物理过程32.1.1雷云中的电荷分布与起电机理32.2雷电放电过程32.3雷电流波形概述32.3.1利用冲击电流发生器模拟雷电流波形32.3.2雷电流波形概念32.4雷电流参数33低压架空配电线路雷电感应过电压的计算33.1架空线路上的雷电感应过电压33.3推倒公式适用范围33.4据落

2、雷点小于65m时，线路感应雷过电压与各参数的关系分析33.5架空线路感应雷击过电压计算总结34感应雷击过电压防护分析34.1配电线路各类雷击故障分析34.2避雷器的介绍与应用34.2.1特点与分类34.2.2有间隙氧化锌避雷器工作原理34.2.3避雷器防雷效果仿真34.3其他防雷措施34.3.1防雷金具与防弧金具34.3.2保护间隙34.3.3采用绝缘塔头和横担34.4防护结语3文献检索317致谢317Contents_Toc421615563AbstractiiiIntroduction31Overheadlinetheresearchback

3、groundandresearchsignificance31.1Theresearchbackgroundandsignificance31.2Theresearchstatusathomeandabroad31.2.1Researchonoverheaddistributionlinesinductionlightningovervoltagecalculation31.2.2Researchonoverheaddistributionlinesinductionlightningovervoltageprotection31.3Inthis

4、paper,theresearchcontentandmainwork32Lightningdischargeisintroducedaswellasthelightningparameters32.1Thephysicalprocessoflightning32.1.1Thechargedistributionandelectrificationmechanismthundercloud32.2Lightningdischargeprocess32.3Summaryoflightningcurrentwaveform32.3.1Usingthe

5、impulsecurrentgeneratortosimulatethelightningcurrentwaveform32.3.2Theconceptoflightningcurrentwaveform32.4Lightningcurrentparameters33Low-pressureoverheadpowerdistributionlinelightninginducedover-voltagecalculation33.1Lightninginducedover-voltageofoverheadlinesontheroad33.2Ov

6、erheadlinelightninginducedover-voltagecalculationmodel33.3Thecomparisonofthederivedformulaandmaterials33.4Accordingtogroundlightningislessthan65m,acircuitinductionlightningovervoltageandrelationshipbetweentheparametersofpoint33.5Overheadlinelightningovervoltagecalculationconc

7、lusion34Inductionlightningovervoltageprotectionanalysis34.1Thefaultanalysisofallkindsoflightning34.2Theintroductionandapplicationofsurgearrester34.2.1Thecharacteristicsandclassificationof34.2.2Workingprincipleofthezincoxidelightningarresterclearance34.2.3Lightningarresterligh

8、tningprotectioneffectismeasured34.3Othermeasuresforlightningprotecti